B3.9 and B5.9 Series Engines
Fuel Lift Pump (005-045)
Section 5 - Fuel System - Group 05
Alternately tighten the mounting capscrews. As the
capscrews are tightened, the fuel transfer pump plunger
is pushed into the pump. Failure to tighten the
capscrews in an even manner can result in the plunger
being bent or broken, causing sticking and failure.
Diaphragm Style and Piston Style
Install the pump.
The 5-mm [0.20-in] spacer (1), Cummins Part No. 3914284,
must be installed along with a gasket, Cummins Part No.
3931348, on each side of the spacer.
NOTE: For some applications, a bracket used for support-
ing other options will replace the 5-mm spacer.
14 mm, 17 mm, 20 mm
Install the fuel line to the fuel transfer pump and fuel filter
head. Use two wrenches to tighten the connection to the
Vent the low-pressure fuel lines. Refer to Procedure
Open the banjo bleed screw to bleed the low-pressure fuel